X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from bay0-omc3-s24.bay0.hotmail.com ([65.54.246.224] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1916593 for flyrotary@lancaironline.net; Mon, 12 Mar 2007 10:46:37 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.224; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.74]) by bay0-omc3-s24.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Mon, 12 Mar 2007 07:45:50 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 12 Mar 2007 07:45:50 -0700 Message-ID: Received: from 4.171.147.161 by BAY115-DAV2.phx.gbl with DAV; Mon, 12 Mar 2007 14:45:49 +0000 X-Originating-IP: [4.171.147.161] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: The truth??? / Injector flow rate mystery solved Date: Mon, 12 Mar 2007 10:45:46 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0064_01C76493.97515B50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Mon, 12 Mar 2007 10:45:46 -0400 X-OriginalArrivalTime: 12 Mar 2007 14:45:50.0055 (UTC) FILETIME=[20814770:01C764B5] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0064_01C76493.97515B50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable In a word, Big. But in the end, it really does not matter. Ed and I have found that = after calibration (compensating for all the cumulative errors), the flow = reading error under cruise conditions is insignificant. It might be = intellectually gratifying to know how much error there is in all 23 = sources but that would be time spent not building and not flying. A = bad trade. But if someone wants to hunt them down and report on them, = I'll listen with interest! Tracy (back to working on the -8, and waiting on Bluemountain - = Arrrgghh.....) ----- Original Message -----=20 From: thomas walter=20 To: Rotary motors in aircraft=20 Sent: Monday, March 12, 2007 10:17 AM Subject: [FlyRotary] Re: The truth??? / Injector flow rate mystery = solved Guys, sorry for the interruption.... How much error is really being seen? =20 Back in my early days at Bosch GmbH (I worked in the IC Center in = Reutlingen, GErmany) on the fuel injectors, and with the BMW system on = calibration. It's been a while, but at the time we had come up with = something like 23 sources of errors on "pulse width" vs. "fuel flow = measurement". =20 Sorry for being such a dummy, but I'm having a hard time trying to = figure out just how much error is involved, and under what rpm range = (idle, cruise, high speed cruise, WOT). =20 Tom Walter (digest mode) -------------------------------------------------------------------------= ----- Never miss an email again! Yahoo! = Toolbar alerts you the instant new Mail arrives. Check = it = out. ------=_NextPart_000_0064_01C76493.97515B50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

In a word, Big.

But in the end, it really does not matter. Ed = and I have=20 found that after calibration (compensating for all the cumulative = errors), the=20 flow reading error under cruise conditions is insignificant. It = might be=20 intellectually gratifying to know how much error there is in all 23 = sources=20 but that would be time spent not building and not flying. A = bad=20 trade. But if someone wants to hunt them down and report on them, = I'll=20 listen with interest!

Tracy (back to working on the -8, and waiting on Bluemountain -=20 Arrrgghh.....)

----- Original Message -----

From: thomas walter

To: Rotary motors in = aircraft

Sent: Monday, March 12, 2007 = 10:17=20 AM

Subject: [FlyRotary] Re: The = truth??? /=20 Injector flow rate mystery solved

Guys, sorry for the interruption....

How much error is really being seen?

Back in my early days at Bosch GmbH (I worked in the IC Center in = Reutlingen, GErmany) on the fuel injectors, and with the BMW system on = calibration. It's been a while, but at the time we had = come up=20 with something like 23 sources of errors on "pulse width" vs. "fuel = flow=20 measurement".

Sorry for being such a dummy, but I'm having a hard time trying=20 to figure out just how much error is involved, and under = what rpm=20 range (idle, cruise, high speed cruise, WOT).

Tom Walter

(digest mode)

Never=20 miss an email again!
Yahoo! Toolbar alerts you the instant new = Mail=20 arrives.=20 Check it out.

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